Hirabayashi Kazuma

Kazuma is a second year high school student, Fuuka's childhood friend and a member of the student council. Unlike her, Kazuma comes from a modest family but he has always treated Fuuka without minding her status as heiress of a family of the most prestigious social classes. Their relationship remained unchanged until their first years in middle school, when after a sex education class Fuuka ordered Kazuma to show her his penis and then, out of curiosity and excitement, to make ejaculate him by giving him a blowjob.

Since this incident, Fuuka has been more "tactile" with Kazuma, while treating him as if he were her servant by giving him orders. Kazuma is then constantly torn by the desire to possess Fuuka's body and despair when he realizes that she only treats him as her childhood friend and thus enclosing the feelings he has for her.